From 559e441cc4e48e372c195186ac844060fac2ad2d Mon Sep 17 00:00:00 2001
From: rgoliver <rgoliver@google.com>
Date: Fri, 3 Feb 2023 21:52:25 -0500
Subject: [PATCH] Rpc: Make GetSerialNumber optional (#24851)

GetSerialNumber previously returned an error if not provided, this
is optional in the spec and should just not return the value if it
is not available.
---
 examples/common/pigweed/rpc_services/Device.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/common/pigweed/rpc_services/Device.h b/examples/common/pigweed/rpc_services/Device.h
index 1427d48d391431..e82095a59a309e 100644
--- a/examples/common/pigweed/rpc_services/Device.h
+++ b/examples/common/pigweed/rpc_services/Device.h
@@ -372,7 +372,7 @@ class Device : public pw_rpc::nanopb::Device::Service<Device>
         if (DeviceLayer::GetDeviceInstanceInfoProvider()->GetSerialNumber(response.serial_number, sizeof(response.serial_number)) !=
             CHIP_NO_ERROR)
         {
-            return pw::Status::Internal();
+            response.serial_number[0] = '\0'; // optional serial field not set.
         }
 
         // Create buffer for QR code that can fit max size and null terminator.